Table 6. Frequency of MCT in general and according to Patnaik and Kiupel’s classification by age and sex. (M) Mean and (SD) Standard deviation.

Factors	All MCTS		Patnaik’s								Kiupel’s						Reference groupa
			MCTs		Grade I		Grade II		Grade III		MCTs		Low grade		High grade
	N	%	N	%	N	%	N	%	N	%	N	%	N	%	N	%	N	%
Age
0–3	16	6.56	15	6.67	2	6.90	7	4.79	6	12.00	7	4.49	4	3.60	3	6.67	58	6.33
4–6	46	18.85	42	18.67	4	13.79	31	21.23	7	14.00	32	20.51	24	21.62	8	17.78	106	11.57
7–10	100	40.98	95	42.22	10	34.48	64	43.84	21	42.00	64	41.03	46	41.44	18	40.00	360	39.30
11–18	64	26.23	59	26.22	9	31.03	37	25.34	13	26.00	41	26.28	29	26.13	12	26.67	339	37.01
Unknown	18	7.38	14	6.22	4	13.79	7	4.79	3	6.00	12	7.69	8	7.21	4	8.89	53	5.79
M ± SD	8.46 ± 3.141		8.47 ± 3.132		8.92 ± 3.108		8.38 ± 3.103		8.49 ± 3.276		8.51 ± 3.066		8.47 ± 2.957		8.63 ± 3.360		9.36 ± 3.526
Sex
Female	133	54.51	126	56.00	15	51.72	85	58.22	26	52.00	85	54.49	62	55.86	23	51.11	460	50.22
Male	111	45.49	99	44.00	14	48.28	61	41.78	24	48.00	71	45.51	49	44.14	22	48.89	456	49.78
Total	244	100.00	225	100.00	29	12.89	146	64.89	50	22.22	156	100.00	111	71.15	45	28.85	916	100.00

^aTotal number of dogs with other skin tumors included in a specific age group.